Joseph Poole, better known as Wednesday 13 (born August 12, 1976), is a rock musician from Charlotte, North Carolina. He is most famous for his role as the frontman of the Murderdolls. He has also played in several other bands, including Psycho Orchestra, Maniac Spider Trash, the Frankenstein Drag Queens From Planet 13, Wednesday 13 and Bourbon Crow.

Poole currently resides in Landis, North Carolina, he lives with his wife Roxanne (Mrs. 13) and his daughter Zoie. Poole is a huge fan of campy horror movie parodies and mildly macabre TV shows such as The Munsters and The Addams Family (the latter being the source of his "Wednesday" moniker), which influence his tongue-in-cheek lyrics greatly. He also created a set of cartoon characters with his wife called the Thirteen Dead Kids, which was released as a clothing line. A book was supposed to be released, though this never happened due to Poole's touring schedule and the lack of publisher.